| /* Copyright 2020 The TensorFlow Authors. All Rights Reserved. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==============================================================================*/ |
| |
| #include <vector> |
| |
| #include "llvm/ADT/DenseMap.h" |
| #include "mlir/Dialect/Func/IR/FuncOps.h" // from @llvm-project |
| #include "mlir/IR/BuiltinOps.h" // from @llvm-project |
| #include "mlir/Pass/Pass.h" // from @llvm-project |
| #include "mlir/Support/LLVM.h" // from @llvm-project |
| #include "tensorflow/compiler/mlir/tensorflow/ir/tf_ops.h" |
| #include "tensorflow/compiler/mlir/tensorflow/ir/tf_saved_model.h" |
| #include "tensorflow/compiler/mlir/tensorflow/transforms/savedmodel_passes_detail.h" |
| |
| namespace mlir { |
| namespace tf_saved_model { |
| namespace { |
| |
| class DedupBoundInputBindingPass |
| : public DedupBoundInputBindingPassBase<DedupBoundInputBindingPass> { |
| void runOnOperation() final; |
| }; |
| |
| void DedupBoundInputBindingPass::runOnOperation() { |
| func::FuncOp func = getOperation(); |
| if (!mlir::tf_saved_model::IsExported(func)) return; |
| llvm::SmallDenseMap<Attribute, unsigned, 8> unique_bound_inputs; |
| llvm::BitVector arg_indices_to_erase(func.getNumArguments()); |
| for (unsigned i = 0, e = func.getNumArguments(); i < e; i++) { |
| auto attr = func.getArgAttrOfType<FlatSymbolRefAttr>( |
| i, "tf_saved_model.bound_input"); |
| if (!attr) continue; |
| auto inserted = unique_bound_inputs.insert(std::make_pair(attr, i)); |
| if (inserted.second) continue; |
| auto duplicate_arg = func.getArgument(i); |
| auto original_arg = func.getArgument(unique_bound_inputs[attr]); |
| duplicate_arg.replaceAllUsesWith(original_arg); |
| arg_indices_to_erase.set(i); |
| } |
| func.eraseArguments(arg_indices_to_erase); |
| } |
| |
| } // namespace |
| |
| std::unique_ptr<OperationPass<func::FuncOp>> |
| CreateDedupBoundInputBindingPass() { |
| return std::make_unique<DedupBoundInputBindingPass>(); |
| } |
| |
| } // namespace tf_saved_model |
| } // namespace mlir |